I'm not into Roadsters, but this looks like it would be a nice one to have. It's located in Spokane too.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=008&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=180147435047&rd=1

Based on the ad for SRL311 #00004 a couple of months ago when it was for sale on eBay, #00005 should be the second oldest still in existance. It doesn't look like this one has a race history though...

http://cgi.ebay.com/ebaymotors/1967-5-Datsun-2000-Documented-Historic-Vintage-Race-Car_W0QQitemZ180119424755QQihZ008QQcategoryZ6188QQrdZ1QQcmdZViewItem

Here is a thread about #00004 when it was for sale.

http://www.classiczcars.com/forums/showthread.php?t=26061

SRL 00003 just sold on ebay for $6700. technically Bob Klemme's add is not correct.

This car is a surviver and a good value/and low serial number car. I think I will stick with my 67.5 SRL 00305 that has racing history since it was new (similar to Bob's car).